Tosoh Corporation

Toshiaki Sakka

Yukio Mitsuhisa

A quantitative liquid sampling instrument comprises a main body of a pipet device which includes a pipet tip having an opening at its lower end for sucking and discharging a liquid. The pipet tip being in a shape of a tube shell having a cavity for holding a liquid sucked therein through the opening and being made of a transparent or semi-transparent material. The main body further comprising a device for applying a gas pressure for sucking or discharging the liquid to or from the inside of the cavity of the pipet tip. The instrument further comprising a liquid level detecting device installed under the main body of the pipet device; a vertical movement control device for moving the main body of the pipet device or a container of the liquid to make them relatively approach one another until a predetermined length of the lower end of the pipet tip is dipped into the liquid in the container; and a computing device for computing the end point of relative approaching movement of the main body of the pipet device and the container and for outputting a signal regarding the end point to the vertical movement control device.

Quantitative liquid sampling instrument

A nozzle device for supplying washing liquid to a reaction vessel holding a carrier therein and for discharging a liquid from the reaction vessel. The nozzle device comprises a cylindrical outer tube having a lower end in a shape of a cone without a vertex and having an axial through-hole in opposition to the reaction vessel and an upper end communicating with a suction device for discharging the liquid. The nozzle device further comprising a cylindrical inner tube inserted loosely in the outer tube, reaching the through-hole of the outer tube, fitting tightly, practically without a gap therebetween, to the axial through-hole at the lower end, and communicating with a washing liquid-supplying device at the upper end thereof to form by itself a supply path for the washing liquid. The nozzle device also includes a liquid discharge path formed between the outside wall of the inner tube and the inside wall of the outer tube. The cone-shaped portion of the outer tube having one or more slits for introducing the liquid from the reaction vessel to the liquid-discharge paths and at least a part of the cone-shaped portion of the outer tube being made of or coated with a fluoro resin.

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Yokohama, Japan

Toshiaki Sakka